<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意，只允许为第三级分类设置相关参数！"
        type="warning"
        show-icon :closable="false">
      </el-alert>
      <el-row class="cat_opd">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            v-model="selectKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange">
          </el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isDisable" @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTabData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close=handleClose(i,scope.row)>{{item}}</el-tag>
                <!-- 输入的input框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#" align="center"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isDisable" @click="addDialogVisible = true">添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTabData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close=handleClose(i,scope.row)>{{item}}</el-tag>
                <!-- 输入的input框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!-- 添加的按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index" label="#" align="center"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row)">编辑</el-button>
                <el-button type="danger" size="mini" icon="el-icon-delete" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
      <!-- 添加参数对话框 -->
      <el-dialog
      :title="'添加' + addText"
      :visible.sync="addDialogVisible"
      width="40%" @close="addDialogClose">
        <el-form :model="addForm" :rules="addRules" ref="addFormRef" label-width="80px">
          <el-form-item :label="addText" prop="attr_name">
            <el-input v-model="addForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addParams">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑参数对话框 -->
      <el-dialog
      :title="'编辑' + addText"
      :visible.sync="editDialogVisible"
      width="40%">
        <el-form :model="editForm" :rules="editRules" ref="editFormRef" label-width="80px">
          <el-form-item :label="addText" prop="attr_name">
            <el-input v-model="editForm.attr_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 分类列表的数据
      cateList: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
        expandTrigger: 'hover'
      },
      selectKeys: [],
      activeName: 'many',
      // 动态属性的数据
      manyTabData: [],
      // 静态参数的数据
      onlyTabData: [],
      addDialogVisible: false,
      editDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addRules: {
        attr_name: [
          { required: true, message: '请输入参数', tigger: 'blur' }
        ]
      },
      editForm: {
        attr_name: ''
      },
      editRules: {
        attr_name: [
          { required: true, message: '请输入参数', tigger: 'blur' }
        ]
      },
      // 编辑的分类Id
      attrId: ''
    }
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品分类失败')
      this.cateList = res.data
      // console.log(this.cateList)
    },
    // 级联选择框值改变的处理函数
    async handleChange() {
      this.getParamsData()
    },
    // tab页签点击事件的处理函数
    handleClick() {
      // console.log(this.activeName)
      this.getParamsData()
    },
    // 获取参数的列表数据
    async getParamsData() {
      if (this.selectKeys.length !== 3) {
        this.selectKeys = []
        this.manyTabData = []
        this.onlyTabData = []
        return false
      }
      // console.log(this.selectKeys)
      // 根据所选分类的id，和当前所处的面板，获取对应的参数
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
      if (res.meta.status !== 200) return this.$message.error('获取参数数据失败')
      // 将字符串转换为数组
      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 控制文本框的显示与隐藏
        item.inputVisible = false
        // 文本框中输入的值
        item.inputValue = ''
      });
      console.log(res.data)
      if (this.activeName === 'many') {
        this.manyTabData = res.data
      } else {
        this.onlyTabData = res.data
      }
    },
    // 监听添加属性对话框的关闭事件
    addDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加动态参数/静态属性
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return false
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, { attr_name: this.addForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) return this.$message.error('添加' + this.addText + '失败')
        this.$message.success('添加' + this.addText + '成功')
        console.log(res)
        this.getParamsData()
      })
      this.addDialogVisible = false
    },
    // 删除参数的事件
    deleteParams(attrId) {
      this.$confirm('确认删除该参数, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
        if (res.meta.status !== 200) return this.$message.error('删除' + this.addText + '失败')
        this.$message.success('删除' + this.addText + '成功')
        this.getParamsData()
      }).catch(() => {
        this.$message.info('已取消删除')
      })
      // console.log(attrId)
    },
    // 编辑分类对话框的展开事件
    showEditDialog(attrInfo) {
      this.editForm.attr_name = attrInfo.attr_name
      this.attrId = attrInfo.attr_id
      console.log(this.editForm.attr_name, this.attrId)
      this.editDialogVisible = true
    },
    // 编辑分类的确定按钮
    async editParams() {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.attrId}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
      if (res.meta.status !== 200) {
        return this.$message.error('更新商品参数失败')
      }
      this.$message.success('更新商品参数成功')
      this.getParamsData()
      this.editDialogVisible = false
    },
    // 文本框失去焦点或摁下了enter键都会触发
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 如果没有return，证明输入的内容，需要做后续处理
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // 需要发起请求，保存这次操作
      this.saveVals(row)
      console.log('ok')
    },
    // 点击按钮 展示文本输入框
    showInput(row) {
      row.inputVisible = true
      // 让文本框自动获得焦点
      // nextTick方法的作用，就是当页面上元素被
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    // 修改vals具体参数的函数
    async saveVals(row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, { attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ') })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败')
      }
      this.$message.success('修改参数项成功')
    },
    // 关闭标签的处理函数
    handleClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.saveVals(row)
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    isDisable() {
      if (this.selectKeys.length !== 3) {
        return true
      }
      return false
    },
    // 当前选中的三级分类的id
    cateId() {
      if (this.selectKeys.length === 3) {
        return this.selectKeys[2]
      }
      return null
    },
    addText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opd {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.input-new-tag {
  width: 120px;
  margin: 10px;
}
.button-new-tag {
  margin: 10px;
}
</style>
